A sunscreen with SPF 50 is sufficient. The numbers reflect the measure of time your skin is shielded from harmful UV rays. A single SPF unit protects you for 15 minutes, which means SPF 50 has got you covered for 8+ hours, enough to safeguard your skin for your daily routine. Don’t forget to reapply if you’re doing outdoor activities! Water and sweat wipe away your defensive layer. Kiehl’s Ultra Light Daily Defense sunscreen is oil-free and protects without that icky, sticky feeling.